Your choice on a diaspora handle since its an application seperate from server core, but if you have selected one reserved by linux as an admin account, when email rolls out you will be left without the ability to receive email via that address 🙁
E.g.
Root
Admin
Postmaster
Abuse
And so on.
Here is a basic list of unix reserved names.
apache:
sshd:
postdrop:
postfix:
mongod:
redis:
nginx:
clamupdate:
amavis:
root:
bin:
daemon:
sys:
adm:
tty:
disk:
lp:
mem:
kmem:
wheel:
mail:
uucp:
man:
games:
gopher:
video:
dip:
ftp:
lock:
audio:
nobody:
users:
dbus:
floppy:
vcsa:
utmp:
utempter:
tcpdump:
rpc:
named:
screen:
nscd:
slocate:
cdrom:
tape::
dialout:
avahi:
saslauth:
mailnull:
smmsp:
apache:
sshd:
nginx:
mailer-daemon:
postmaster:
bin:
daemon:
adm:
lp:
sync:
shutdown:
halt:
mail:
news:
uucp:
operator:
games:
gopher:
ftp:
nobody:
radiusd:
nut:
dbus:
vcsa:
canna:
wnn:
rpm:
nscd:
pcap:
apache:
webalizer:
dovecot:
fax:
quagga:
fax:
quagga:
radvd:
pvm:
amanda:
privoxy:
ident:
named:
xfs:
gdm:
mailnull:
postgres:
sshd:
smmsp:
postfix:
netdump:
ldap:
squid:
ntp:
mysql:
desktop:
rpcuser:
rpc:
nfsnobody:
ingres:
system:
toor:
manager:
dumper:
abuse:
newsadm:
newsadmin:
usenet:
ftpadm:
ftpadmin:
ftp-adm:
ftp-admin:
www:
webmaster:
noc:
security:
noc:
security:
hostmaster:
info:
marketing:
sales:
support:
service:
services:
sendmail:
mailman:
ssladmin:
ssl:
hosting:
email:
decode: